Microsoft will launch Office for the iPad, iPhone, and Android in early 2013, sources for The Verge claim. Dubbed Office Mobile, the software is expected to take the form of free apps that, on a basic level, will let people view Office documents. Users will allegedly require an account with Microsoft, like the current OneNote and SkyDrive apps.

Actually editing documents, though, is expected to demand an Office 365 subscription. People will be able to buy one through the app, or else enter a code, something that should allow larger organizations to set up their workforces. Editing options may be relatively limited, not intended to replace the desktop versions of Office.
The sources say that Office Mobile for iOS should launch first, sometime in late February or early March. The Android version is anticipated in May. Microsoft has refused to comment on the story, except to say that Office "will work across Windows Phone, iOS and Android." There's no word on when Windows Phone apps might debut.